Next Article in Journal
3D-Hydrogel Based Polymeric Nanoreactors for Silver Nano-Antimicrobial Composites Generation
Previous Article in Journal
N-Doped TiO2-Coated Ceramic Membrane for Carbamazepine Degradation in Different Water Qualities
Previous Article in Special Issue
Application of Carbon Nanotubes in Chiral and Achiral Separations of Pharmaceuticals, Biologics and Chemicals
Article Menu
Issue 8 (August) cover image

Export Article

Open AccessArticle
Nanomaterials 2017, 7(8), 208; doi:10.3390/nano7080208

Chirality on Amorphous High-Tg Polymeric Nanofilms: Optical Activity Amplification by Thermal Annealing

1
Dipartimento di Chimica Industriale Toso Montanari and INSTM UdR-Bologna, University of Bologna, Viale Risorgimento 4, 40136 Bologna, Italy
2
Interdepartmental Center for Industrial Research on Advanced Applications in Mechanical Engineering and Materials Technology (CIRI-MAM), University of Bologna, Viale Risorgimento 2, 40136 Bologna, Italy
*
Author to whom correspondence should be addressed.
Received: 7 June 2017 / Revised: 10 July 2017 / Accepted: 27 July 2017 / Published: 1 August 2017
(This article belongs to the Special Issue Frontiers in Chiral Nanomaterials)
View Full-Text   |   Download PDF [2341 KB, uploaded 1 August 2017]   |  

Abstract

The chiroptical properties of amorphous chiral polymers functionalized with conjugated trans-azoaromatic chromophore linked to the backbone through a chiral cyclic pyrrolidine moiety of one single configuration at the solid state, as thin films, were investigated. For the first time nanometric thin films of amorphous polymers (not liquid crystals) showed a remarkable chiral amplification upon thermal treatment at a temperature close to their Tg. The side-chain azobenzene chromophores rearrangement driven by the enhanced chain mobility seems to favor the formation of nanodomains of conformationally ordered macromolecular chains with one prevailing helical handedness whose optical activity depends on the configuration of the intrinsic chirality of the monomeric units and which as a result are stable at room temperature for a long time. View Full-Text
Keywords: azobenzene containing-polymers; conformational chirality; chiral polymers; circular dichroism; chiral amplification azobenzene containing-polymers; conformational chirality; chiral polymers; circular dichroism; chiral amplification
Figures

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Benelli, T.; Lanzi, M.; Mazzocchetti, L.; Giorgini, L. Chirality on Amorphous High-Tg Polymeric Nanofilms: Optical Activity Amplification by Thermal Annealing. Nanomaterials 2017, 7, 208.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Nanomaterials EISSN 2079-4991 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top